Is E.P.S. a water, vapor or air barrier?
E.P.S. is considered water resistant and vapor permeable and at the density and thickness that American Ingenuity utilizes, the material acts as both a vapor retarder and an air barrier. This characteristic essentially moves the dew point to the exterior side of the concrete wall, minimizing interior humidity in the summer, and at the same time eliminates air infiltration in all seasons which is recognized as a major cause of R-value loss in fiberglass insulation. Air exchangers or heat recovery ventilation systems are highly recommended! Is E.P.S. foam toxic? E.P.S. is an inert, non-biodegradable organic plastic foam which will not rot and is highly resistant to mildew. According to National Bureau of Standards Combustion Tests, data collected from seven labs concluded that under the worst case fire scenario, fumes from E.P.S. are no more toxic than those from wood (Douglas Fir). Is E.P.S. Flammable?
